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<table width="100%" summary="page for leaflength"><tr><td>leaflength</td><td style="text-align: right;">R Documentation</td></tr></table>

<h2>Leaf length of barley</h2>

<h3>Description</h3>

<p>In an experiment barley was grown in a hydroponic solution with a herbicide.
</p>


<h3>Usage</h3>

<pre>data(leaflength)</pre>


<h3>Format</h3>

<p>A data frame with 42 observations on the following 2 variables.
</p>

<dl>
<dt><code>Dose</code></dt><dd><p>a numeric vector</p>
</dd>
<dt><code>DW</code></dt><dd><p>a numeric vector</p>
</dd>
</dl>



<h3>Details</h3>

<p>The dataset exhibits a large hormetical effect.
</p>


<h3>Source</h3>

<p>Nina Cedergreen, Royal Veterinary and Agricultural University, Denmark.
</p>


<h3>Examples</h3>

<pre>

## Fitting a hormesis model
leaflength.crs4c1 &lt;- drm(DW ~ Dose, data = leaflength, fct = CRS.4c())
plot(fitted(leaflength.crs4c1), residuals(leaflength.crs4c1))

leaflength.crs4c2 &lt;- boxcox(drm(DW ~ Dose, data = leaflength, fct = CRS.4c()), 
method = "anova", plotit = FALSE)
summary(leaflength.crs4c2)

## Plottinf fitted curve and original data
plot(leaflength.crs4c2, broken = TRUE, conLevel = 0.001, type = "all", legend = FALSE, 
ylab = "Produced leaf length (cm)", xlab = "Metsulfuron-methyl (mg/l)",
main = "Hormesis: leaf length of barley")

</pre>


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